Apparatus for coating pipes.



D. HEGGIE.

APPARATUS FOR COATING PIPES.

APPLICATION FILED NOV. 25. I914. 1,147,723. Patented July 27, 1915.

IIIIIIII 2 SHEETSSHEET I.

%VZ:'N SSES INVENTO D. HEGGIE.

APPARATUS FOR COATING PIPES.

APPLICATION FILED NOV.25| I914. r 1,147,723. Patented July 27, 1915.

2 SHEETS-SHEET 2.

5 A I ,':'i' l'-N m n [mu u wrmassas I v I f |N;ENT0 'l M DAVID I-IEGGIE, 0F LORAIN, OHIO, ASSIGNOR 'TO NATIONAL TUBE COMPANY, OF

PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY. i

APPARATUS FOR COATING PIPES.

Specification of Letters Patent. P tented July 27,1915.

Application filed November 25, 1914. Serial No. 873,978.

To all whom it may concern:

Be it known lfill3Ll3sI,DAVID HEGGIE, a c1t1- zen of the Unitedi$,tates, and resident of Lorain, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Apparatus for Coating; Pipes, of which the following is a SPBClfication.

My invention relatssto apparatus for fill-y? ishing wrought metal-.-=pipes, and tubes, andmore particularly relates to apparatus for brush or swab, ,or to drop the articles in a bath of the coating liquid, and such methods have been found to be slow,.wasteful and Y 111130 and out of the trough the axisof the inefficient, and correspondingly expensive.

One object of my invention is to provide" apparatus of novel construction having means whereby the coating is mechanically or automaticallyapplied to the outer surface of the pipe, tube or other cylindrical body.

Another object of the invention is to provide apparatus for coating pipes and tubes having novel means whereby the outer surface of such materials is rapidly coated without waste in a cheap and eflicient manner.

A further object of my invention is to provide pipe coating mechanism having novel means whereby the pipes are handled in moving the pipes and tubes into and out of position for applying the coating.

Still further objects of my invention consist in the novel construction and arrangement of parts, as is more fully described hereinafter and specifically pointed out in the appended claims.

Referring now to the drawings forming part of this specification, Figure 1 is a top plan showing apparatus for coating pipes, tubes and similar articles, constructed and arranged in accordance with my invention. Fig. 2 is a sectional side elevation of the apparatus shown in Fig. 1. Fig. 3'is an end elevation of the apparatus shown inFigs. 1 and 2-, showing the reducing gearing by which rotating pipe supporting rollers are operatively connected to the roller driving motor. Fig. 4: is a sectional end elevation, taken'on the line IVIV of F ig. 1, showing, on an enlarged scale, the construction of the pipe lifting mechanism by which the pipes v and tubes are removed from the troughcontaining the coating liquid or mixture.

In the accompanying drawings, the, nu-

meral 2 designates a long,,narrow and shal: f

low trough, supported at its ends onstands 3, 3, and havlng similar supports 4 at intervals' 1n lts'length. The trough 2, which as shown is cast integrally, may be built up in sections, with the'sections bolted, riveted, or otherwlse secured together. Extending length-wise horizontally and axially parallel within the trough 2 are the coating applying rollersl5 ahd 6, the rollers 7 being arranged side by side to support and i rotate pipes placed thereon, in applying the coating medium to the pipes. On account of the length of the trough, the rollers 5 and '1 6 are preferably made in sections, -as shown,

and to facilitate the transfer-of the pipes roller 5 is somewhat higher. than thatof theroller 6. Y I The shafts 7 and 8, to which the roller sections .5, 5, and 6, 6, 6, are keyed or other- .wise secured so as to rotate therewith, are

diate bearings 11 are staggered with regard to the intermediate bearing 10, and in this way all parts of the outer surface of the pipes being coated is brought into contact with the surface of one or another of the roller sections 5 or 6, and coating ofthe entire surface of the pipes is thereby insured.

Provided on one end of the shafts 7 and 8 are spur gears 12, 12, which mesh with the spur pinion 14 on the counter-shaft 15 that is mounted in the bearings 16 at oneend of the trough 2, the counter-shaft also being provided with a spur gear 17 by which the counter-shaft 15 is rotated, which meshes with the driving pinion 18 on the armature shaft 19 of the driving motor 20. The motor 20 and bearing 16 on which one end of the counter-shaft 15is mounted, are secured on a suitable base plate 21 provided at the end of the trough 2 for that purpose.

The trough 2 has a pocket or well 22 in its shaft which meshes with and is driven by the spur gear 17 forming part of the reducing gearing by which the driving motor 20 is connected to theshafts 7 and S.

Extending lengthwise between the rollers 5 and 6 in the trough 2 and somewhat below the axis of rotation of the rollers, is a jet pipe 27, this pipe having a series of small holes 28 along its length, with at least part of the holes located so as to cause the coating liquid to spurt upwardly between the two rollers 5 and 6. One end of the pipe 27 is connected by the pipe 29 to the discharge outlet of the pump 24 so that when the rollers are rotated the pump is operated and the oil or other coating fluid is forced through the pipe and out of the holes therein upwardly into contact with the surface of a pipe supported upon the rollers 5 and 6 1n the trough 2. lVhen pipes being coated, which are not exactly straight, are placed in position to be rotated on and by the rollers 5 and 6 to have a coating applied thereon, it is found that the rollers will not always contact with all points on the surface of the pipe being coated and the jet pipe 27' between the rollers provides means fordischarging a series of small streams of the coating material on the pipes between the rollers, the pipe being coated forming the top of an inclosure whose sides are defined by the rotating rollers 5 and 6.

The sectional rollers 5 and 6 may be conveniently made of pieces of wrought metal pipe or tubing in the manner shown, suitable spiders being employed to fasten the roller sections on the shafts 7 and 8, the spiders being keyed or otherwise secured on the shafts. The outer surfaces of the rollers 5 and 6 preferably are covered with felt Ora, similar woven fabric which being absorbent forms rollers which carry a suflicient amount of the coating fluid thereon to quickly supply the necessary amount to coat the contacting surfaces of pipes supported onthe rollers. A quantity of the coating fluid is maintained in the trough2, the level of the fluid being maintained at about the level shown, so that the rollers will always be partly submerged in the coating liquid or fluid.

Secured in bearings 30 at one side of the trough 2, so as to extend lengthwise parallel with the 'lengthwise center of the trough, is a rocking shaft 31, and mounted on the shaft, adjacent to the ends thereof,

are lifting arms 32, 82, which project over one side of and into the trough below the level of the tops of the rollers 5 and (5, these arms projecting into the gaps formed between the adjoining ends of the sections of the rollers (i. The shaft 31 is provided with a downwardly extending rocking arm 3?; having a forked lower end-,"and secured in the forked end ofthis' arm is a cross-head 84 having sliding blocks 35 pivotally secured on the sides thereof by means of apivot pin or bolt 35. The sliding blocks extend into the recess 36 in each branch of the forked arm 33 so as to provide a sliding contact between this arm and the reciproeating cross-head 34. The cross-head is positioned at an intermediate point in the length of a piston rod 37, and this piston rod is provided at one end with a piston 38 which is mounted in a. horizontal double-acting fluid pressure cylinder 39 by which the cross-head is reciprocated. The piston rod 37 extends through the stufling box 40 and gland 41, of the usual known construction, on one head of the cylinder, and the cylinder is provided at its ends with port openings, these openings being connected by the pipes 42 and 43 with an operating valve (not shown), through which the cylinder is connected with a source of fluid pressure. The opposlte end of the piston rod 37 extends through a bearing 44, having bushings therein, and on the end of thejpliinger a stop is provided to limit the movement of the plunger in one direction, The end of the cross-head 34, by engagingiwith "the end of the bearing 44, forms a. stop by which the length of travel of the piston rod in one direction is determined.

The trough 2 is erected bet-ween the ends of storage beds or tables 46 and 47, as shown in Figs. 1 and 4, the pipes to be coated being supported on the beds 46 and 4? in transferring them into and out of coating applying position.

In the operation of my improved. pipe coating apparatus, the trough 2 is filled with oil or other coating fluid to about the level shown in Fig. 4. A pipe, tube, or other article-is then rolled from the bed 46 into the trough 2 in the position shown in broken is caused to rotate by frictional engagement with the felt covered surfaces of the rollers and the coating fluid carried on the surfaces is transferred to the surfaces of the pipe so as to apply an even coat of the coating liquid to the pipe in a rapid and economical manner. When the motor 20 starts to operate, the pump 24 is also started and forces coating fluid from the well 22 in the trough 2 through the pipe 29 into the horizontal pipe 27 and then through the series of small holes 28 in this pipe. The jets of coating fluid expelled through these openings are discharged on the surface of the tube or pipe being coated, so that should the pipe or tube be slightly bent, or bent to an extent sufficient to not contact at all points in its length with the surfaces of the felt covered rollers 5 and 6, coating fluid will be applied.

thereto by the jet pipe. After the coating has been applied to a pipe or tube positioned on the rollers 5 and (5, fluid pressure is admitted to the rear end of the fluid pressure cylinder 39, and the rocker arm 33 is thereby caused to swing, and through the rock shaft 31 to actuate the lifting arms 32. The pipe being lifted off the rollers 5 and 6 by the lifting arms 32 will roll forward off the arms, to the supports l7 forming the bed at the right of Fig. 4. Another pipe is then rolled from the supports 46 forming the bed at the left of Fig. 4, into the trough 2, and the above described operations are repeated. The series of steps or operations which have been described are repeated with successive pipes placed in position on the rollers 5 and 6, which pipes may be of any of the numerous different sizes made, and a coating of oil or other liquid in the trough is evenly and uniformly applied to the outer surfaces of such pipes.

The advantages of my invention will be apparent to those skilled in the art: By the use of my improved mechanism the coating liquid is applied to the pipe in a much more rapid, eflicient and economical manner than is possible by hand labor. The apparatus is simple and is easily kept in repair.

Modifications in the construction and arrangement of the parts may obviously be made without departing from my invention as defined in the appended claims.

I claim 1. Apparatus for coating pipes and similar cylindrical bodies comprising a trough to contain a coating liquid, pipe supporting rollers within said trough, said rollers being positioned to rotate pipes supported thereon and extending downwardly into the liquid, means for rotating said rollers to thereby convey to and apply the coating liquid on the surface of pipes supported on said rollers, and a perforated pipe extending lengthwise between said rollers and arranged to spray coating liquid on the surface of the pipes during the pipe coating operations.

2. Apparatus for coating pipes and similar'cylindrical bodies comprising a trough containing a coating liquid, sectional rollers forming means for supporting and rotating pipes in said trough, said means being arranged to transfer coating liquid from the trough to the surface of the rotating pipes, means on which the pipes are transferred to the trough, means on which the pipes are conveyed away from the trough, and lifting arms whereby the coated pipes are transferred from the trough, said arms being arranged to extend within the gaps formed between the ends of the sectional rollers and below pipes positioned on said rollers.

3. Apparatus for coating pipes and similar cylindrical bodies comprising a trough to contain a coating liquid, pipe supporting rollers within said trough, said rollers being positioned to support and rotate the pipes in said trough and extending downwardly into the liquid, means for rotating said rollers to thereby convey and apply coating liquid to the surface of pipes supported on the rollers, a perforated pipe extending lengthwise between said rollers and arranged to spray coating liquid on the surface ofthe pipes during the pipe coating operations,

and a pump for supplying coating liquid to said perforated pipe.

4. Apparatus for coating pipes and similar cylindrical bodies comprising a trough containing av coating liquid, a pair of rollers in said trough for supporting and rotating a pipe above the liquid, said rollers being arranged to transfer coating liquid from the trough to the surface of a rotating pipe supported thereon, lengthwise parallel power driven shafts on which said rollers are secured, and bearings in which said shafts are rotatably mounted, the roller sections on one shaft overlapping the roller sections on the other, shaft bearings being positioned between the adjacent ends of said roller sections.

In testimony whereof, I have hereunto set my hand.

DAVID HEGGIE. lVitnesses ARTHUR R. GRABER, Davin H. PINKNEY. 

